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http://dx.doi.org/10.7843/kgs.2008.24.6.57

Evaluation of Correlation between Subgrade Reaction Modulus and Strain Modulus Using Plate Loading Test  

Kim, Dae-Sang (Railroad System Research Center, Korea Railroad Research Institute)
Park, Seong-Yong (Dept. of Civil and Environmental Engrg., Yonsei Univ.)
Kim, Soo-Il (Dept. of Civil and Environmental Engrg., Yonsei Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.24, no.6, 2008 , pp. 57-67 More about this Journal
Abstract
Two test methods, nonrepetitive plate loading test (NPLT) and repetitive plate loading test (RPLT) are being used to control the quality of compaction through the evaluation of the stiffness of subgrade soils in the Korea railway industry. Subgrade reaction modulus ($k_{30}$) from the NPLT and strain modulus ($E_v$) from the RPLT are the index values to check them. The methods have similar aspects, but they differ in the modulus evaluation method, the numbers of loading stage, termination procedures, etc. This paper analyses the differences of the two test methods and evaluates the relationship between subgrade reaction modulus and strain modulus. In order to develop the relationship, total 22 tests were performed including the NPLT and the RPLT at the 6 original grounds, and 5 upper or lower subgrades in Kyungbu High Speed Railway II stage construction sites. According to the soil conditions, the relationship between subgrade reaction modulus and strain modulus was proposed with corrections by considering strain states, mean confining pressures, and Poisson's ratio.
Keywords
Nonrepetitive plate loading test; Railway; Repetitive plate loading test; Strain modulus ($E_v$; ); Subgrade reaction modulus ($k_{30}$; );
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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